Illuminate\Database\Query\Builder::unionAll PHP Method

    public function unionAll($query)
    {
        return $this->union($query, true);
    }

 /**
  * Add a union all statement to the query.
  *
  * @param \Illuminate\Database\Query\Builder|\Closure $query
  * @return \Illuminate\Database\Query\Builder|static 
  * @static 
  */
 public static function unionAll($query)
 {
     return \Illuminate\Database\Query\Builder::unionAll($query);
 }